/Engine/Source/Runtime/Net/Core/Public/Net/Core/Connection/NetEnums.h
Types of network failures broadcast from the engine
namespace ENetworkFailure { enum Type { NetDriverAlreadyExists, NetDriverCreateFailure, NetDriverListenFailure, ConnectionLost, ConnectionTimeout, FailureReceived, OutdatedClient, OutdatedServer, PendingConnectionFailure, NetGuidMismatch, NetChecksumMismatch, } }